Auxiliary bicycle seat



FIG. 1 is a left side elevational view of an auxiliary bicycle seat showing my new design, it being understood that the broken lines are for illustrative purposes only;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right side elevational view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for the auxiliary bicycle seat, as shown and described. 